Five identical springs are used in the following three configurations. The time periods of vertical oscillations in configurations (i), (ii) and (iii) are in the ratio
  • A$1:\sqrt 2 :\frac{1}{{\sqrt 2 }}$
  • B$2:\sqrt 2 :\frac{1}{{\sqrt 2 }}$
  • C$\frac{1}{{\sqrt 2 }}:2:1$
  • D$2:\frac{1}{{\sqrt 2 }}:1$
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